Fix typo in enabling command `upcase-region`

Seems like I accidentally erased "regi" portion of the function name.
Draw a column line at 100 in programming modes

Set `fill-column` to 100 and enable `fci-mode` for programming modes.
`fci-mode` is added to `prog-mode-hook` in package definition while
`set-fill-column` is added to same hook unconditionally.